diff --git a/package.json b/package.json
index 9760b3e..79c85a9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@observablehq/runtime",
-  "version": "5.9.5",
+  "version": "5.9.6",
   "author": {
     "name": "Observable, Inc.",
     "url": "https://observablehq.com"
diff --git a/yarn.lock b/yarn.lock
index 4a64a57..c23bdee 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -126,9 +126,9 @@
     isoformat "^0.2.0"
 
 "@observablehq/stdlib@^5.0.0":
-  version "5.8.4"
-  resolved "https://registry.yarnpkg.com/@observablehq/stdlib/-/stdlib-5.8.4.tgz#31db8c79559cb707347656f87975a030d6dbc687"
-  integrity sha512-AcYclKQPLv9JJTinZ9kbEYYMGM+hGf2qpZ6nr41FjbZdF6+sxFdFNnW3l9reZ+xJ8iOpp0UHa4MvN08v5FtcRQ==
+  version "5.8.5"
+  resolved "https://registry.yarnpkg.com/@observablehq/stdlib/-/stdlib-5.8.5.tgz#f547239c26db1c8bbf24a144dfdee6e237c0b285"
+  integrity sha512-EnPH8Hk4bTYYkJkcPIE70cFMD6gC3oF0+X74qkqMsq7c1dDGUnjSl/M8RQv/hTlALLUNmjYHuiKZwapqrenAbA==
   dependencies:
     d3-array "^3.2.0"
     d3-dsv "^3.0.1"